Fiber Bragg Grating Battery Monitoring for Multiparameter Sensing
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Solution Overview
Problem
Existing electrical sensors used for monitoring energy storage batteries are susceptible to electromagnetic interference, have poor corrosion resistance, and are difficult to implement in a complex, narrow, closed, and corrosive environment, limiting their ability to measure multiple parameters effectively.
Innovation Solution
A multiparameter integrated online monitoring system using Fiber Bragg Grating (FBG) sensors with ultra-low reflectivity, connected via optical fibers, to measure temperature, strain, pressure, current, voltage, and gas composition, enabling a distributed and multiplexed sensing network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electrical sensors are used for monitoring energy storage batteries, then multiple parameters can be measured, but the sensors are susceptible to electromagnetic interference and have poor corrosion resistance in the complex battery environment
Solution Approach 1:
The patent replaces electrical sensors with optical fiber sensors that use light transmission instead of electrical signals. The optical fiber sensors are immune to electromagnetic interference and corrosion, solving the reliability problem while maintaining multi-parameter measurement capabilities through different sensing mechanisms embedded in the optical fiber.
Solution Approach 2:
The patent introduces optical fiber as an intermediary medium to transmit sensing information. The optical fiber acts as a mediator that carries light signals through the battery environment without being affected by electromagnetic fields or corrosion, enabling reliable transmission of measurement data from multiple parameters.
2Adaptability or versatility
If multiple electrical sensors are installed in the battery, then multiple parameters can be monitored, but the wiring becomes extremely complex and occupies large space
Solution Approach 1:
The patent merges multiple sensing functions into a single optical fiber by embedding different types of sensors (temperature, strain, pressure, gas concentration) along the length of one optical fiber. This consolidation eliminates the need for separate wiring for each sensor, dramatically reducing wiring complexity and space occupation while maintaining comprehensive multi-parameter monitoring.
Solution Approach 2:
The optical fiber serves as a universal transmission medium that can carry multiple types of sensing signals simultaneously. Different sections of the same optical fiber can be configured with different sensing capabilities, allowing one fiber to perform the function of multiple separate sensors and their associated wiring.
3Measurement precision
If traditional sensors are used in the narrow battery internal space, then parameter measurement can be achieved, but the sensor layout becomes complex and occupies excessive space
Solution Approach 1:
The patent segments the optical fiber into multiple sensing zones along its length, with each segment configured to measure specific parameters at different locations within the battery. This segmentation allows precise measurement of temperature, strain, pressure, and gas concentration at various points without requiring bulky sensor housings, as the sensing elements are distributed along the thin optical fiber.
Solution Approach 2:
The optical fiber acts as a thin, flexible sensing element that can be easily routed through the narrow battery internal space. Its thin film structure allows it to conform to the battery geometry and access confined areas where traditional bulky sensors cannot be installed, maintaining measurement precision while minimizing space occupation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides real-time monitoring of multiple parameters with high precision, resistance to electromagnetic interference and corrosion, and simplifies sensor layout, enhancing safety and predicting battery health and lifespan.
Implementation Method 1
optical fiber sensing online monitoring system and method based on a Fiber Bragg Grating (FBG) array sensing technology
Data Source
AI summary
A multiparameter integrated online monitoring system and method for at least one energy storage battery based on Fiber Bragg grating (FBG) are provided. The system includes multiple sensors based on the FBG including a temperature, a strain, a pressure, a current, a voltage and a gas sensor, a FBG demodulator, a computer, and transmission optical fibers. The multiple sensors are connected in series on one transmission optical fiber and can be multiplexed to establish the multiparameter integrated and distributed optical fiber sensing monitoring network from single battery to module, or from single battery to cluster, or from single battery to energy storage system. The system has advantages of simple structure, small occupied space, anti-electromagnetic interference, corrosion resistance, multiparameter integration and distributed simultaneous measurement. It can monitor the status of the multiple parameters in real time, so as to judge the charge, health status and remaining life of the battery.